Analysis and Solutions of the Influence of Structural Factors on Tracking Accuracy of Remote Sensing Antennas
For the antenna equipment of remote sensing ground stations,tracking accuracy is a key technical indicator of servo control systems.Structural factors such as resonance frequency and friction of mechanical structure that affect tracking accuracy are analyzed,and the relationship between the influencing factors and the antenna tracking accuracy is given.Theoretical relationship between tracking errors:the resonant frequency of antenna mechanical structure mainly affects the servo dynamic hysteresis error and the high elevation tracking error traceability;the friction torque mainly affects the tracking random error and the servo low speed tracking stability performance.On this basis,a solution to improve low speed stability performance is proposed,and a digital composite control fusion new structural filter(digital notch filter+inertia element)is proposed.The state tracking control method solves the problem that the low resonant frequency of the mechanical structure of the narrow beam antenna affects the servo tracking performance question.Test results show that the minimum stable operating speed of antenna reaches 0.005(°)/s,and speed error is better than 10％;the antenna acceleration is 0.393(°)/s2,the azimuth dynamic tracking error reaches 0.006 2°.The antenna design method for remote sensing ground stations is practical and effective,providing a theoretical basis for the design of similar antenna servo control systems in the future.
万方数据
维普
